If a neutron star attains a mass over ________ solar masses it becomes a black hole
Fill in the blank(s) with correct word
three
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A dime is 1.8 cm in diameter. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full moon
a. 2 m b. 2 cm c. 2 km d. 2 inches e. 2 ft
The speed of light in vacuum is
A. smaller than the speed of light in glass B. the same as the speed of light in glass C. greater than the speed of light in glass
If a doubly-ionized oxygen atom (O–2) is accelerated from rest by going through a potential difference of 32 V, what will be the change in its kinetic energy?
a. 16 eV b. 32 eV c. 64 eV d. 51 eV e. none of the above
A water rocket built from a two-liter bottle half-filled with water pressurized with compressed air can develop a thrust of 300 N
At what rate would water have to come out of the rocket to develop that thrust? The jet of water emerging from the bottle has a diameter of 2.20 cm and the density of water is 1000 kg/m3. A) 2.70 kg/s B) 5.30 kg/s C) 10.7 kg/s D) 32.1 kg/s E) 21.4 kg/s